Solution:

The largest ecosystem of the earth is the biosphere. The atmosphere of the whole earth from oceans to mountains, deserts to the forest, all is covered by it. Though the ecosystem of the earth can be divided into many narrow subdivisions and are known as hydrosphere, biosphere, Lithosphere and the Biome.

A hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air. A planet’s hydrosphere can be liquid, vapour, or ice. On Earth, liquid water exists on the surface in the form of oceans, lakes and rivers.